Apollo TEMP-1B - Wireless Battery-Powered Connected Temperature Sensor for Home Assistant

Introduction

The TEMP-1B from Apollo Automation revolutionizes mobile temperature monitoring by completely freeing users from mains power constraints. This standalone version with a rechargeable battery offers up to 6 months of autonomy while retaining all the advanced features of the TEMP-1 system, including external probes and multimodal alerts.

Perfectly suited for temporary installations, isolated areas, or mobile applications, the TEMP-1B excels in monitoring unpowered structures such as cellars, garages, leisure vehicles, or outdoor installations under shelter. Its "Works With Home Assistant" certification ensures native ESPHome integration without compromising performance, while its open-source design allows full customization to meet specific needs.

This solution transforms inaccessible environments into smart monitoring points, creating an extended monitoring network without electrical infrastructure while maintaining the precision and responsiveness of a permanent wired system.

Key Features

Exceptional Autonomy and Mobility

• 6-month autonomy: Rechargeable 16340/CR123A battery with intelligent energy management
• Optimized standby modes: 12-hour sleep configuration to maximize battery life
• Energy monitoring: Real-time battery level and voltage monitoring via Home Assistant
• Free installation: Deployment without power constraints, ideal for isolated zones and temporary applications

Mobile Multi-Sensor Monitoring System

• Built-in AHT20-F sensor: Measures ambient temperature/humidity with automated thermal compensation
• Hot-swap external probes: 3.5mm jack compatible with waterproof DS18B20 and high-temperature food-grade NTC probes*
• Specialized monitoring: Applications for cellars, vehicles, agricultural installations, event monitoring
• Deployment flexibility: Easily repositionable according to evolving monitoring needs

Intelligent Energy Management and Alerts

• Consumption optimization: Configurable reporting intervals, advanced energy-saving modes
• Visual/audible alerts: RGB LED and piezo buzzer with optimized consumption management
• Event wake-up: Instant triggering of critical alerts even in standby mode
• Dual power supply: USB-C for configuration/testing, battery for standalone deployment

Advanced Wireless Connectivity

• Native ESPHome integration: Instant Home Assistant auto-discovery, WiFi hotspot configuration
• Long-range communication: WiFi 802.11 b/g/n optimized for installations distant from the router
• Intelligent firmware: Automatic network reconnection management, error recovery, OTA updates
• Secure local API: Local data processing, encrypted communications, privacy compliance

Technical Specifications

Mobile and Energy Architecture

• Microcontroller: ESP32-C3-MINI-1 with built-in battery consumption optimizations
• Power supply: Rechargeable 16340/CR123A battery (not included) + USB-C 5V/1A for configuration
• Autonomy: 6+ months with 12-hour reporting, up to 1 year in extended standby mode
• Dimensions: 48mm × 30mm × 30mm (integrated battery compartment, compact design)
• Enclosure: Reinforced 3D architecture with easy battery access, improved sealing

Battery Management and Energy Monitoring

• Recommended Battery: 16340/CR123A Li-ion rechargeable (Nitecore, Efest, Olight)
• External Charging: Specialized charger required (Nitecore i2/i4 recommended)
• Advanced Monitoring: Charge percentage, instant voltage, remaining battery life estimation
• Battery Protection: Deep discharge thresholds, low battery alerts, safe shutdown

Sensor Specifications and Precision

• Main Sensor: AHT20-F temperature (-40°C to +80°C, ±0.3°C) and humidity (0-100% RH)
• Compatible Probes: Waterproof DS18B20 (-55°C to +85°C), food-grade NTC (350°C max)*
• Modular Interface: 3.5mm jack with automatic Dallas/Food switching, interchangeable probes
• Calibration: Configurable temperature offsets, ESP32 thermal drift compensation

Home Assistant Integration and Ecosystem

• Complete Entities: Temperature/humidity, battery level, external probes, LED/buzzer controls
• Battery Automations: Low charge alerts, wake-up scheduling, power-saving mode management
• Flexible Configuration: Variable reporting intervals, custom thresholds, conditional actions
• System Accessories: Magnetic support, waterproof probes, stainless steel food-grade

Deployment and Specialized Applications

• Mobile Use Cases: Cellar/attic monitoring, leisure vehicles, agricultural setups, event monitoring
• Easy Installation: Initial USB-C setup, autonomous battery deployment, optional magnetic support
• Requirements: 16340/CR123A battery + external charger

*More Information About the Probe

The food-grade probe is designed to withstand temperatures up to 350°C. However, to ensure measurement reliability, it has been tested in an oven up to around 200°C (400°F), which is the recommended usage limit.

The probe contains an internal resistor, and its accuracy is optimal around 93°C (200°F). The further the measured temperature deviates from this value, the more the accuracy decreases. For this reason, its use is recommended up to 204°C (400°F).